Description

The FL7930B is an active power factor correction (PFC) controller for boost PFC applications that operate in critical conduction mode (CRM). It uses a voltage-mode PWM that compares an internal ramp signal with the error amplifier output to generate a MOSFET turn-off signal. Because the voltage-mode CRM PFC controller does not need rectified AC line voltage information, it saves the power loss of an input voltage sensing network necessary for a current-mode CRM PFC controller.

Features

■ Additional OVP Detection Pin

■ VIN-Absent Detection

■ Maximum Switching Frequency Limitation

■ Internal Soft-Start and Startup without Overshoot

■ Internal Total Harmonic Distortion (THD) Optimizer

■ Precise Adjustable Output Over-Voltage Protection

■ Open-Feedback Protection and Disable Function

■ Zero Current Detector (ZCD)

■ 150 μs Internal Startup Timer

■ MOSFET Over-Current Protection (OCP)

■ Under-Voltage Lockout with 3.5 V Hysteresis

■ Low Startup and Operating Current

■ Totem-Pole Output with High State Clamp

■ +500/-800 mA Peak Gate Drive Current

■ 8-Pin, Small-Outline Package (SOP)

Applications

■ Ballast

■ General LED Lighting

■ Industrial, Commercial, and Residential Fixtures

■ Outdoor Lighting: Street, Roadway, Parking, Construction, Ornamental LED Lighting Fixtures